Scale of photoelectric encoder including base member having roughened surface and manufacturing method of scale
US9258007B2 · kind B2 · utility
2Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2012 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Jul 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34707
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A scale of a photoelectric encoder includes a base member and gratings on the base member. The gratings can be formed on the surface of the base member by plating and arranged at a prescribed pitch on the base member. The surface of the base member is a roughened surface which is roughened by sandblasting or with a chemical. The gratings are light absorptive gratings or light reflective metal gratings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.